# -*- coding: utf-8 -*-
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
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from airflow.models.taskinstance import TaskInstance

from airflow.models.baseoperator import EventMetHandler
from airflow.models.event import Event
from airflow.models.taskstate import TaskState, TaskAction


class RestartEventMetHandler(EventMetHandler):

    def handle_event(self, event: Event, ti: TaskInstance, ts: TaskState, session=None):
        return TaskAction.RESTART


class StopRestartEventMetHandler(EventMetHandler):

    def handle_event(self, event: Event, ti: TaskInstance, ts: TaskState, session=None):
        if 'stop' == event.key:
            return TaskAction.STOP
        elif 'restart' == event.key:
            return TaskAction.RESTART
        else:
            return TaskAction.START
